Full load enrichment and economical driving

Hello to each other, today’s petrol engines (still) have a full load enrichment or similar lubrication, if you push through the pedal at low speed? What is the best way to drive sprite-saving? Push through the accelerator pedal completely or almost? If you are looking for the shell diagrams/consumption parameters of the manufacturers, you should be on the right track without having to worry about it, right?